-b+9=12b

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Solution for -b+9=12b equation: 



-b+9=12b

We move all terms to the left:

-b+9-(12b)=0

We add all the numbers together, and all the variables

-13b+9=0

We move all terms containing b to the left, all other terms to the right

-13b=-9

b=-9/-13

b=9/13

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